prop doesn't even look like it would give enough thrust to even make a paperplane go..
I've always thought the same thing when looking at a T6 or SNJ, large(ish) plane for a single, and only a 2 blade prop.  But it still works pretty well.   Granted it's not the fastest of planes but....
EDIT:  
Hmmmm, now that I look at it again, could 
that BE a modified T6, one of the 
Tora, Tora, Tora  "Zeros"?   Hard to tell without a profile (for me anyway, I'm sure one of the experts will set me straight.)